Elevator



Sept. 6, 1932.

G. E. cARLsTRAND 1,876,398

ELEVATOR Filed June 1951 I5 Sheets-Sheet 1 Sept. 6, 1932.

G. E. CARLSTRAND ELEVATOR Filed June '24. i951 3 Sheets-Sheet 2 lwav E (rrim/ld Sept. 6, 1932. G'.y E. CARLSTRAND `ELEvAToR Filed Juri@ 424, 19:51

3 Sheets-Sheet 3 Haj-l TIL Patented Sept. 6, 1932 UNITED :s'rnres' GUSTAV E. CARLSTRAND, OF BALTIMORE, MARYLAND ELEVATOR Application led lJune 24,

This invention relates to improvements in elevators such as used to remove grain -or other material from the holds of boats, although not necessarily restricted to this use.

An limportant object of my invention is the provision of novel means for supporting and vcontrolling the elevator chute commonly known as a marine leg.7

Another object of my invention is the provisionof a novel type of discharge spout for the elevator chute.

A further obj ect of my invention lis to provide a device of this character which is elflcient in operation, of simple construction, strong and durable.

Other ob'ects and advantages of my invention will be apparent 4during the v'course of the following description.

In the accomp anying drawings, which form a part of this specification, and wherein like characters of reference denote like parts throughout the same,

Figure 1 is a side elevation of an elevator t having my invention applied thereto, '25 Figure 2 is a front elevation thereof, parts being removed,

Figure 8 is a detail elevation of the crosshead and its associated part-s,

Figure -4 is a front elevation thereof, parts being removed,

Figure 5 is a plan view of the pusher element, showing its attachment to the 'crosshead, and,

Figure 6 is a detail sectional view of the telescoping spout.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates the upright frame structure comprislng a pair of spaced guide rails vor I-beams 11 vertically arranged and suitably supported on a pier or similar structure 12. A crosshead structure 13 is slidably arranged on the 14 in any suitable manner. Counterbalance weights 15 are connected to the crosshead by means of cables 16 which pass over pulleys 17 at the top of the upright structure 10. A boom is pivoted adjacent the lower end of the cross head and comprises spaced, up-

beams 11 and is raised and lowered by cables 1931. Serial No. 546,567.

wardly converging farms 18 which pivotally engage the upper endof an elevator chute or marine leg 1'9. The upper end ofthe boom lis vmoved 'toward and away 'from the crosshead by means of cables 20 passing 55' around pulleys 21 on the crosshead and pulleys 22 secured to the boom. l

The marine leg 19 is provided with a lcontinuous belt or the like 23 interiorly thereof which carries suitable conveyor buckets or elements 1(not shown). The lmarine -l'eg .is lowered into the hold of a boat 24 and adj usted therein by means ofthe boom 18.

The construction thus far described is usual in .the Iboom and crosshead type of marine leg. Diiiculty has been experienced, however, in properly positioning the leg 19, es-

peclally when raising or lowering the leg to compensate 'for differences in the size or positions of boats, or different water levels. I have provided 'a novel form of pusher arm whichv obviat-es these difficulties and allows the operators to easily regulate the position of f the leg.

My pusher element is best shown in Figures 3 and 5' and vcomprises a pair of spaced arms or beams 24 suitably connected and braced by cross pieces 25. A pair of vertically arranged square threaded screws 2'6 of substantial length are rotatablymounted between tracks 27 in suitable brackets on the crosshead, and are rotated by means of a m0- tor 28 mounted on the crosshead, and connected to the screws 26'through bevel gears 29. Nuts 30 engage the screws 26 and are carried 65 by ywheeled trucks 31 engaging the tracks 27 and pivotally secured to the arms of the pusher element'. f It will be seen that the inner ends ofthe pusher arms 24 may be adjusted vertically by 90 rotating the screws 26. The outer ends of the pusher arms 24 support a shaft 32 on which flanged rollers 33 are rotatably mounted to engage the leg 19. I Suitable guide flanges 34 are provided which 9" extend alongside of the leg to prevent its displacement. A suitable bracket is arranged adjacent the outer end of the pusher elem-ent and engages the crosshead Ain the inner position of the pusher element, asseen VBti in dotted lines in Figure 3. A similar bracket 36 is arranged on the upper side of the boom 18 adjacent its outer end, and engages a portion of the crosshead in the inner or nested position of the boom, as also seen in dotted lines in Figure 3. This bracket resists twisting tendencies oi boom 18.

A suitable cable or cables 37 is secured to the upper portion of the crosshead and passes over a suitable pulley 38 adjacent the outer end ot the boom 18 and is secured to the outer end ot' the pusher element. When the boom 18 is moved towards the frame beams 11, the

Hslack in the cable 37 allows the pusher element to drop, thereby maintaining the marine leg 19 in substantially the same position relative to a vertical plan-e. Adjustment of the angular position of the leg 19 may be obtained by operating the motor 28 to rotate the screws 26 and raise or lower the inner end of the pusher element and consequently shorten or lengthen its edective length. lWhen the boom is lowered, the pusher element is raised by the pull exerted on the cable 37 during the lowering of the boom. It will be seen, therefore, that the leg may be raised or lowered by the movement of the crosshead and of the boom, and that its angular position may be maintained or adjusted by the pusher element. In the nested position of the leg, it is arranged substantially parallel to the frame structure 10, and rests upon the supporting block 39 shown in Figure 1.

A suitable housing 40 is provided for the motor driven chains which drive the elevator belt. A motor 40 operates the chains to drive the conveyor belt. The leg 19 is a rigid metal housing which contains the belt 23 and its buckets.

At the upper end of the leg 19 a spout 41 communicates with the interior of the leg, extends between the braces 42 of the crosshead and down the frame structure 10 to suitable conveyors 43. The sections 44 of the spout which extend along the frame 10 are formed from two spaced pieces of metal joined at their upper ends by filler strips 45. The sections 44 telescope as seen in Figure G, and each succeeding section must be larger to accommodate the section below. The sections are provided with ears 46 which slidably engage guide rails 47 extending up the frame 10. Chains, cables or the like 48 connect the lower ends of the sections 44 to limit their relative movement and prevent separation oi the sections. An elbow 49 extends through the crosshead and is provided at its upper end with an enlarged arcuate connecting portion 50. The adjacent section of the spout is provided with a similar enlargement 51 adapted to receive the enlargement 50, and is pivoted to the elbow 49. A similar pivotal connection 52 connects the upper end of the spout with the marine leg, and the portion of the spout between the connections 51 and 52 is formed in two or more telescoping sections. rllhe telescoping portion of the upper section is doublewalled as shown at 53, to ree ceive the lower section.

lt will be seen that the portion of the spout between the crosshead and elevator leg is pivoted at each end, and free to telescope. Movement ot the boom will be taken up by the pivots and telescoping of the sections, while movement of the crosshead will extend or retract the sect-ions 44 of the spout. The doublewalled structure of the telescoping sections will shed grain or other material on the inside, and water on the outside. The arcuate pivot sections 51 and 52 may also be formed with double walls to shed grain or the like.

rlhe cables controlling the movement of the boom, and crosshead may be operated in any suitable manner, as by means of the drums 54 which may be operated by the same power used for the conveyors 43. The drums 54 operate the ship shovels but do not affect the operation of applicants boom and crosshead structure.

ln operation, the boom is lowered to move the conveyor leg 19 away from the :trame 10, and then lowered, by means of the crosshead, into the hold of the boat 24. The position of the leg is adjusted, and the elevator buckets operated to raise the grain or other ma" terial which is 'emptied into the spout 41 and delivered to the conveyors 43. Adjustment of the elevator leg is easily and quickly accomplished, and movement of the crosshead or boom will maintain substantially constant the angular position of the elevator leg due to the pusher element 24 mounted on the crosshead.

llhile I have shown and described the preferred embodiment of my invention it is to be understood that various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit oli' my invention or the scope of the subj oined c aims.

Having thus described my invention, what l claim and desire to protect by Letters Patent is:

1. ln a device of the character described, a frame structure, a crosshead supported for movement thereon, a boom pivoted to the crosshead, an elevator leg pivoted to the boom, a pusher arm secured to the crosshead and engaging the elevator' leg to maintain its angular position substantially constant during movement of the boom, and means to move the inner end of said pusher arm longitudinally of the crosshead.

2. lin a device oi the character described. a frame structure, a crosshead supported for movement thereon, a boom pivoted to the crosshead, an elevator leg pivoted to the boom a screw shaft mounted longitudinally of said crosshead for rota-tion, anut arranged on said shaft to be moved by rotation thereof, and a pusher arm secured to said nut and engaging said elevator leg to cooperate with the boom to maintain the angular position' of the leg substantially constant during movement of the boom.

3. In a device of the character described, a frame structure, a crosshead mounted thereon, a boom pivoted to said crosshead, an elevator leg pivoted to said boom a pusherarm pivoted to the crosshead and engaging the elevator leg, and means whereby movementof the boom will cause a movement of the pusher arm in the opposite direction.

4. In a device of the character described, a frame structure, a crosshead mounted thereon, a boom pivoted to said crosshead, an elevator leg pivoted to said boom, a pusher arm pivoted to the crosshead and engaging the elevator leg, means whereby movement of the boom will cause an opposite movement of the pusher arm, and means independent of the movement of the boom to adj ust the position of the pusher arm.

5. In a device of the character frame structure, a crosshead mounted thereon, a boom pivoted to sai-d crossh-ead'and having a pulley adjacent 'the outer end thereof, an elevator leg pivoted to said boom, a pusher arm pivoted to the crosshead and engaging the elevator leg, and a flexible element connecting the upper portion of the crosshead with the Vpusher arm and passing around the pulley on the boom.

6. In a device ofthe character described, a frame structure, a crosshead mounted thereon, a boom pivoted to said crosshead and having a pulley arranged adjacent its outer end, an elevator leg pivoted to the boom, a pusher arm pivoted 'to the crossliead and engaging the elevator leg below its connection with the boom, a cable connecting the upper portion of the crosshead with the pusher Aarm and passing around the pulley on the boom whereby movement of the boom causes an opM posite movement of the pusher arm, and means independent of the movement of the boom for adjusting the position of the pusher arm.

7 In a device of the character-described, a frame structure, a crosshead mountedthereon, a boom pivoted to the crosshead and having a pulley arranged adjacent its outer end, an elevator leg pivoted to the boom, a

screw shaft arranged longitudinally of said crosshead, a nut mounted'on said shaft, a pusher arm pivotally secured to said nut and engaging the elevator leg below its connection with the boom, means to rotate the shaft 'to adjust the position of the pusher arm, and a cable connecting the upper portion of the crosshead to the pusher arm and passing around the pulley on the crosshead, said cable supporting the pusher arm.

described, a

8.. In a device of the character described, a frame,` a crosshead mounted for movement thereon, a boom pivoted to the crosshead, an elevator leg pivoted to the boom, a pusher arm pivoted to the crosshead and engaging the elevator leg, means whereby movement of 'the boom causes opposite movement of the pusher arm to maintain the angular position of the leg substantially constant, a spout elbowsecured to said crosshead, telescoping spout sections extending from said elbow down said frame, and telescoping spout sections pivotally connecting the elevator leg with the spout elbow. Y

9. In a device of the character described, a frame structure, a boom pivoted thereto, an elevator leg pivoted tothe boom, a pusher arm pivoted to the frame and engaging the elevator leg, and means whereby movement of the boom in one ,direction will cause a movement of the pusher arm in the opposite direction. Y

10. In a device of the character described, a frame structure, a boom pivoted thereto, an elevator leg pivoted to the boom, a pusher arm secured to the frame and engaging the elevator leg lto maintain its angular position substantially constant during movement of the boom, and means to move the inner end of said pusher arm longitudinally of the frame and independently ofsaid boom.

11. In a device of the character described, a frame structure, a boom pivotally supported thereon, an elevator leg pivoted to the boom, a screw shaft mounted longitudinally of said frame structure for rotation, a nut arranged on said shaft to belmoved by rotation of the shaft, and a pusher arm secured to said nut and engaging said elevator leg to cooperate .with the boom to maintainthe angular position of the leg substantially constant during movement ofthe boom. y

12. In a device of the character described, a frame structure, a boom pivotally supported thereon, an elevator leg pivoted to said boom, a pusher arm pivotally supported on the frame structure and engaging the elevator leg,'means whereby movement of the boom in one direction will cause a movement of the pusher arm in the opposite direction, and means independent of the movement of the boom to adjust the position of the pusher arm.

In testimony whereof I aiX my signature.

GUSTAV E. CARLSTRAND. 

